| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
The rate of flow of electrons per unit time is which of the following?
resistance |
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current |
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conductance |
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voltage |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
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one-way street |
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highway |
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parking lot |
A diode allows current to pass easily in one direction and blocks current in the other direction.
What is the primary difference between a rectifier and an inverter?
a rectifier converts an AC input to DC while an inverter converts a DC input to AC |
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a rectifier converts a DC input to AC while an inverter converts an AC input to DC |
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a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion |
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a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion |
A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.
The voltage output of a transformer primarily depends on which of the following?
the number of turns in the wire of the coils |
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the diameter of the wire in the coils |
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the diameter of the coils |
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the conductor used for the wire in the coils |
A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.
| series-parallel | |
| series | |
| perpendicular | |
| orthogonal |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 72V 25A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 150A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 36V 75A configuration.